docker_test_pull.go

package main

import (
	"fmt"
	"os"

	"github.com/fsouza/go-dockerclient"
)

func main() {
	fail := func(args ...interface{}) {
		fmt.Println(args...)
		os.Exit(1)
	}

	if len(os.Args) < 2 {
		fail("Please specify image to pull")
	}
	image := os.Args[1]

	client, err := docker.NewClientFromEnv()
	if err != nil {
		fail("Docker error:", err)
	}

	repo, tag := docker.ParseRepositoryTag(image)
	err = client.PullImage(docker.PullImageOptions{
		Repository:    repo,
		Tag:           tag,
		RawJSONStream: true,
		OutputStream:  os.Stdout,
	}, docker.AuthConfiguration{})
	if err != nil {
		fail("Failed to pull image:", err)
	}
}